Nowadays, with the development of technology, internet is used more than before. So in my view, it’s useful to learn online. Firstly, for teacher, it’s convenient to give comments on the homework that are been hand in online. Secondly, for students, if you learning online you needn’t take such time to search the information and without buying books which are not really need. At the same time, learning online you also could communicate with your classmates and other people from all over the world. Thirdly, if we are handing in homework online take place of writing it on paper could protect environment. It’s necessary to protect our living environment. In a word, I reckon learning online is useful and convenient to our study, our lives.